Filter-Free Band-Selective Organic Photodetectors

Lan，Zhaojue1,2; Lau，Ying Suet1; Wang，Yiwen1; Xiao，Zuo3; Ding，Liming3; Luo，Dan2; Zhu，Furong1

2020

10.1002/adom.202001388

Advanced Optical Materials   影响因子和分区

2195-1071

2195-1071

The present band-selective photodetection is realized by incorporating different optical filters with broadband photodetectors (PDs). However, the use of the optical filters reduces the overall PD sensitivity. This work reports on the effort to develop high-performance filter-free band-selective organic photodetectors (OPDs) having a heterostructure photoactive layer architecture, comprising a semiconducting shorter-wavelength light depletion layer and a bulk heterojunction (BHJ) layer with an extended absorption to longer wavelengths. The filter-free band-selective photodetection is realized by adjusting the difference in wavelengths between the transmission cut-off wavelength of the semiconducting light depletion layer and the absorption edge of the BHJ layer. For example, a filter-free visible-blind near-infrared OPD, with a spectral rejection ratio of 100, a high responsivity of 0.39 A W, a high −3 dB cutoff frequency of 80 kHz, and a fast response time of ≈7 µs, is demonstrated, offering an exciting option for a plethora of applications in imaging and light communications.

band-selective photodetection filter-free photodetection light communication near-infrared absorption organic photodetectors, photoactive layers

SCI ; EI

英语

其他

Research Grants Council of Hong Kong Special Administrative Region, China[12302817][12303920] ; NSFC/RGC Joint Research Scheme[N_HKBU201/19] ; National Key Research and Development Program of China[2017YFA0206600] ; National Natural Science Foundation of China[51773045][21772030][51922032][21961160720]

Materials Science ; Optics

Materials Science, Multidisciplinary ; Optics

WOS:000582401100001

WILEY-V C H VERLAG GMBH

20204309394396

Optical communication ; Infrared devices ; Cutoff frequency ; Photons ; Light absorption ; Optical filters ; Heterojunctions

Semiconductor Devices and Integrated Circuits:714.2 ; Optical Communication Systems:717.1 ; Light/Optics:741.1 ; Optical Devices and Systems:741.3 ; Atomic and Molecular Physics:931.3

2-s2.0-85093511170

Scopus

1.Department of Physics,Research Centre of Excellence for Organic Electronics,Institute of Advanced Materials,and State Key Laboratory of Environmental and Biological Analysis,Hong Kong Baptist University,Kowloon Tong, NT,Hong Kong
2.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Center for Excellence in Nanoscience (CAS),Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS),National Center for Nanoscience and Technology,Beijing,100190,China

Lan，Zhaojue,Lau，Ying Suet,Wang，Yiwen,et al. Filter-Free Band-Selective Organic Photodetectors[J]. Advanced Optical Materials,2020,8(24).

Lan，Zhaojue.,Lau，Ying Suet.,Wang，Yiwen.,Xiao，Zuo.,Ding，Liming.,...&Zhu，Furong.(2020).Filter-Free Band-Selective Organic Photodetectors.Advanced Optical Materials,8(24).

Lan，Zhaojue,et al."Filter-Free Band-Selective Organic Photodetectors".Advanced Optical Materials 8.24(2020).